NGSS.MS-PS1-4

S8P1cd When enough heat is added to liquid water, it boils, and bubbles of water vapor rise to the surface and into the air. Which type of change is this and why?

• a chemical change because gas is produced

• a chemical change because heat is produced

• a physical change because the identity fo the substance changes

• a physical change, because the substance changes state

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NGSS.MS-PS1-4

In an endothermic reaction, energy is _________.

• absorbed

• released

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NGSS.MS-PS1-4

Temperature usually _____ in EXOthermic reactions.

• Stays the same

• Increases

• Decreases

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NGSS.MS-PS1-4

100 degrees Celsius is the ----- of water.

• Melting point

• Freezing point

• Boiling point

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NGSS.MS-PS1-4

Why is the upper mantle liquid, but the lower mantle is solid?

• Upper mantle is hotter

• Lower mantle is under higher pressure

• Upper mantle is under higher pressure

• Lower mantle is hotter

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NGSS.MS-PS1-4

If a warm wind passes over snow, the snow can be heated rapidly. When this happens, the snow can change directly into water vapor without first becoming liquid water. What is the correct term for this process?

• deposition

• evaporation

• melting

• sublimation

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NGSS.MS-PS1-4

What happens to the movement of the particles in a substance when the thermal energy is decreased?

• Speed Up

• Slow Down

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NGSS.MS-PS1-4

The colder the temperature, the _______ the particle's motion.

• Faster

• Slower

• Smaller

• Larger

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NGSS.MS-PS1-4

When you take a cold water bottle out of the refrigerator, after about 5 minutes, there are water droplets on the sides of the bottle.

Where does the water come from?

• Inside the bottle

• the refrigerator

• the freezer

• the air

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NGSS.MS-PS1-4

Which image shows particles in a gas?

• 
• 
• 

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NGSS.MS-PS1-4